- 专利标题: FLISR without communication
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申请号: US16580404申请日: 2019-09-24
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公开(公告)号: US11128127B2公开(公告)日: 2021-09-21
- 发明人: Michael Quinlan
- 申请人: S&C Electric Company
- 申请人地址: US IL Chicago
- 专利权人: S&C Electric Company
- 当前专利权人: S&C Electric Company
- 当前专利权人地址: US IL Chicago
- 主分类号: G01R31/08
- IPC分类号: G01R31/08 ; H02H7/26 ; G06Q50/06
摘要:
A control system and method for a feeder, or portion of the distribution grid, which enables fault location, isolation and service restoration without communications between the feeder switches. The method uses definite time coordination between feeder switches and local measurements to determine which switches should open or close in order to isolate the fault and restore service downstream of a faulted section. Time-current characteristics and feeder topology are shared with all switches in the feeder prior to a fault event. When a disturbance occurs, a timer is started at each switch. When a switch measures voltage loss in all three phases, it stops its timer. Each switch evaluates the timer values and, when a particular switch determines based on the time-current characteristics that the immediate upstream switch opened to isolate the fault, that particular switch also opens. Power upstream of the particular switch is then provided by an alternative source.